For normal adjustment, length of astronomical telescope isPhysics A. fo + fe B. fo – fe C. fo / fe D. fe / fo
Two automobiles are 150 kilometers apart and traveling toward each other. One automobile is moving at 60km/h and the other is moving at 40km/h mph. In how many hours will they meet?
The most fundamental of all sciences which provides basic principles and fundamental laws to other branches of science is
